java JSON转换

`

// 将对象转换成json字符串
public static String objectToJson(Object data) {
ObjectMapper mapper = new ObjectMapper();
try {
String string = mapper.writeValueAsString(data);
return string;
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return null;
}

//将json结果集转化为对象
public static T jsonToPojo(String jsonData, Class beanType) {
ObjectMapper mapper = new ObjectMapper();
try {
T t = mapper.readValue(jsonData, beanType);
return t;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

`